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/* tqdata.h
*
* This include file contains all the constants and structures
* needed to declare a thread queue.
*
* COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994.
* On-Line Applications Research Corporation (OAR).
* All rights assigned to U.S. Government, 1994.
*
* This material may be reproduced by or for the U.S. Government pursuant
* to the copyright license under the clause at DFARS 252.227-7013. This
* notice must appear in all copies of this file and its derivatives.
*
* $Id$
*/
#ifndef __RTEMS_THREAD_QUEUE_DATA_h
#define __RTEMS_THREAD_QUEUE_DATA_h
#ifdef __cplusplus
extern "C" {
#endif
#include <rtems/chain.h>
#include <rtems/priority.h>
#include <rtems/states.h>
/*
* The following enumerated type details all of the disciplines
* supported by the Thread Queue Handler.
*/
typedef enum {
THREAD_QUEUE_DATA_FIFO_DISCIPLINE, /* RTEMS_FIFO queue discipline */
THREAD_QUEUE_DATA_PRIORITY_DISCIPLINE, /* RTEMS_PRIORITY queue discipline */
} Thread_queue_Disciplines;
/*
* The following record defines the control block used
* to manage each thread.
*/
#define TASK_QUEUE_DATA_NUMBER_OF_PRIORITY_HEADERS 4 /* # of pri groups */
typedef struct {
union {
Chain_Control Fifo; /* FIFO discipline list */
Chain_Control Priority[TASK_QUEUE_DATA_NUMBER_OF_PRIORITY_HEADERS];
/* priority discipline list */
} Queues;
boolean sync; /* alloc/dealloc critical section */
Thread_queue_Disciplines discipline; /* queue discipline */
States_Control state; /* state of threads on Thread_q */
} Thread_queue_Control;
/*
* _Thread_queue_Header_number
*
* DESCRIPTION:
*
* This function returns the index of the priority chain on which
* a thread of the_priority should be placed.
*/
STATIC INLINE unsigned32 _Thread_queue_Header_number (
rtems_task_priority the_priority
);
/*
* _Thread_queue_Is_reverse_search
*
* DESCRIPTION:
*
* This function returns TRUE if the_priority indicates that the
* enqueue search should start at the front of this priority
* group chain, and FALSE if the search should start at the rear.
*/
STATIC INLINE boolean _Thread_queue_Is_reverse_search (
rtems_task_priority the_priority
);
#include <rtems/tqdata.inl>
#ifdef __cplusplus
}
#endif
#endif
/* end of include file */
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